MB88152A 데이터 시트보기 (PDF) - Cypress Semiconductor

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MB88152A

Spread Spectrum Clock Generator

Cypress Semiconductor 

6. Block Diagram

VDD

MB88152A

SEL

FREQ/FREQ0

XENS/FREQ1

XOUT

Modulation rate setting

Frequency setting

Modulation enable /

Frequency setting

Reference clock

PLL block

Clock output

CKOUT

XIN

Rf = 1 MΩ

VSS

1

−

M

Phase

compare

Charge

pump

V/I

conversion

IDAC

ICO

Modulation

Reference

1

clock

−

Loop filter

clock

output

N

1

Modulation

−

Modulation logic

rate setting/

L

Modulation

MB88152A PLL block

enable setting

A glitchless IDAC (current output D/A converter) provides precise modulation, thereby

dramatically reducing EMI.

Document Number: 002-08308 Rev. *B

Page 6 of 24

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